Lever mechanism



(No Model.) 2 heets-Sheet 1. A. L. G. GAUTTARD.

LEVER MECHANISM. No. 430,282. Patented June 17, 1890.

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UNITED STATES PATENT OFFICE.

ALBERT LOUIS GABRIEL GAUTTARD, OF PARIS, FRANCE.

LEVER MECHANISM.

SPECIFICATION forming part of Letters Patent No. 430,282, dated June 17, 1890.

Application filed July 25, 1889. Serial No. 318,678. (No model.) Patented in France March 6, 1889, No. 196,507-

To all whom it may concern:

Be it known that I, ALBERT LoUIs GABRIEL GAUTTARD, of the city of Paris, France, have invented an Improved Lever Mechanism, (for which I have obtained Letters Patent in France for fifteen years, dated March 6, 1889, No. 196,507,) of which the following is a full, clear, and exact description.

My invention consists of a combined lever and pulley, together constituting a lever having a shifting fulcrum.

In the accompanying drawings I have illustrated several examples of the modes of application of my invention and the purposes for which it is employed; and in Figure 1 it consists of a lever suspended by means of a cord attached to the lever at two points A B and passing over a pulley D, hung from a fixed point, the power P being applied at point C and the load at R, the power and load being thereby applied on opposite sides of the point B. Fig. 2 represents the posi tion of the different parts of the apparatus when the point C is lowered. Figs. 3 and 4 show different forms of the lever. Fig. 5 shows the cord or chain provided with an eye J on one member, through which the end A of the lever is passed, (as in Fig. 6,) the other end being attached by a hook or swivel. Figs. 7 to 14 illustrate various applications of the apparatus.

Owing to the shifting motion of the fulcrum, the leverage is increased as the long end of the lever, to which the power is applied, is drawn down, so that the same power P will overcome a load more easily the farther the lever is moved. This result is attained by supporting the lever at two points A B by means of the cord F F, passing over a pulley D, as above mentioned, the effect being similar to that which would be attained by a fulcrum movable along the lever toward the end A as the end 0 is depressed, so that the short arm of the lever gradually diminishes while the long arm increases in length, whereby the same power may be made to overcome a gradually-increasing load or resistance. Such an apparatus is capable of many applications. For instance, a sick person by its aid may lift any part of his body, or patients who can only be attended to at long intervals be enabled to shift their positions as often as they desire, and this with the greatest case, so as to avoid any violent movements. It would also be especially useful for persons paralyzed in one arm or leg, the apparatus being in this case operated by a handle or treadle. The apparatus is also generally applicable for lifting weights, such as for military and naval use, bridgebuilding, mounting heavy guns in batteries,

as well as for handlinglarge projectiles. If a horse happen to fall while harnessed to a Vehicle, he may also be raised by means of this apparatus, provided it be slung from a jib or other support, as shown in Fig. 12.

In Fig. 3 the point of attachment B of the cord is about the mid-length of the lever A O, the end A being cleft to facilitate the passage of the lifting-cord and a ring or eye being fixed at point B, to which is attached the swivel B of cord F. O is a groove for the attachment of a cord 0, provided with a hand-pull.

In Fig. 14 the knot A is generally provided with a cross-pin or spherical enlargement, serving as a stop to abut against the cleft end .A of the lever when the part A G of the lifting-cord is engaged therein. The ends of the cord are furnished with swivels or S- hooks, the hook G being capable of swiveling, to allow of the load rotating when the lever is held stationary.

In Fig. 5 the cord is provided at A with an eye J to receive the end A of the lever, Fig. 4, the eye being formed by a thimble, around which the cord is passed and spliced above the thimble, the pendent part being simply twisted, as shown.

I claim A lever otherwise wholly unsupported, having a cord or chain connected to it at two points and extending from its upper side, and a support for said cord or chain, the power P and the load B being applied to said lever on opposite sides of the point B, that connects it with one end of said chain or cord, in combination with the shifting fulcrum, over which said cord passes, as specified.

The foregoing specification of my improved mechanical motion signed by me this 6th day of July, 1889.

ALBERT LOUIS GABRIEL GAUTTARD.

IVitnesses:

EDWARD P. MAOLEAN, HENRI MULLER. 

